My partner decided to stop his antidepressant (Wellbutrin) last week and is claiming it’s so much better for him, when he’s been irritable/getting angry over little things/being very negative.

I’m not sure how to approach this. He’s been on this medication for years now and has never stopped it all of a sudden. He hasn’t spoken to his doctor or anything, last week he decided to stop. From Monday-Wednesday I noticed him being very irritated, angry and just on edge. On Wednesday, he told me he stopped taking the medication. It all made sense to me and I asked him why/if it was a good idea. He said it was. It’s now a week later and he’s still being negative over little things/being irritated/zoned out. What can I do? Do I talk to his mom? I am really upset about this all because he’s being very rude to me.